Classification
658 - General management
1,106
330 - Economics
562
700 - The arts; fine & decorative arts
291
333 - Economics of land & energy
274
600 - Technology
251
381 - Commerce
202
000 - Computer science, information & general works
199
370 - Education
186
363 - Other social problems & services
163
620 - Engineering & allied operations
161
900 - History & geography
150
610 - Medicine & health
140
320 - Political science
128
380 - Commerce, communications & transportation
122
300 - Social sciences
90
500 - Natural sciences & mathematics
84
580 - Plants (Botany)
80
140 - Specific philosophical schools
79
302 - Social interaction
61
576 - Genetics & evolution
58
355 - Military science
56
338 - Production
49
100 - Philosophy & psychology
45
551 - Geology, hydrology & meteorology
44
650 - Management & auxiliary services
42
630 - Agriculture & related technologies
38
720 - Architecture
38
745 - Decorative arts
38
670 - Manufacturing
35
331 - Labor economics
34
400 - Language
34
659 - Advertising & public relations
32
170 - Ethics
30
340 - Law
29
304 - Factors affecting social behavior
28
158 - Applied psychology
25
800 - Literature & rhetoric
25
006 - Special computer methods
23
005 - Computer programming, programs & data
21
174 - Occupational ethics
21
332 - Financial economics
21
414 - Phonology & phonetics
20
581 - Specific topics in natural history
20
004 - Data processing & computer science
19
361 - Social problems & social welfare in general
15
410 - Linguistics
15
540 - Chemistry & allied sciences
15
384 - Communications; telecommunication
13
530 - Physics
13
153 - Mental processes & intelligence
12
more ...